The Galloping Parameters Study of Ice-Coating Transmission Line

2013 ◽  
Vol 734-737 ◽  
pp. 2796-2801
Author(s):  
Long Liu ◽  
Yu Xian Di ◽  
Kuan Jun Zhu ◽  
Xin Min Li ◽  
Cao Lan Liu
Keyword(s):  
Finite Element ◽  
Wind Speed ◽  
Finite Element Model ◽  
Transmission Line ◽  
Element Model ◽  
Attack Angle ◽  
Single Bundle ◽  
Initial Attack ◽  
Initial Tension ◽  
Suspension Insulator

In this paper, 3-DOF finite element model for galloping has been built on the basis of form-finding analysis. Fitting formula about aerodynamic parameters has been obtained by wind tunnel test. With the combination of finite element model and aerodynamic parameter, a simulation model of single bundle on 3-span was built. And the response of ice-coating transmission line was calculated with different span, initial attack angle, wind speed, suspension insulator length and initial tension. With the comparison of the calculated results, span, initial attack angle, wind speed and initial tension have direct effect on galloping amplitude, order of the galloping, load on suspension insulator and tension on the midpoint of span. On the contrary, suspension insulator length doesnt have obvious effect on galloping.

Studies on Galloping of Iced Conductor Based on Tower-Line Coupling System – Aerodynamic Loads

2012 ◽  
Vol 182-183 ◽  
pp. 1630-1633
Author(s):  
Hao Jun Hu ◽  
Yuan Han Wang ◽  
Zi Dong Hu
Keyword(s):  
Finite Element ◽  
Wind Speed ◽  
Finite Element Model ◽  
Aerodynamic Force ◽  
Element Model ◽  
Aerodynamic Characteristics ◽  
Explicit Integration ◽  
Computing Platform ◽  
Coupling System ◽  
Line Coupling

Based on the second development at the ANSYS computing platform, finite element model of a Tower-Line Coupling system was established. The computational fluid dynamics module (CFX) was used for the numerical simulation of the aerodynamic characteristics of iced conductor. On the basis of the Kaimal spectrum, fast Fourier transform was introduced to prepare the wind speed simulation program WVFS with spatial correlation into consideration, thus generating aerodynamic coefficients of iced conductor at different wind attack angles as well as wind speed time series at tower-line nodes. According to the finite element model of continuous multi-conductors and the aerodynamic force- wind attack angle curve, the explicit integration is applied for numerical solution of galloping of iced conductor.

Study on Numerical Simulation of Iced Conductor Galloping for Multi-Span Power Transmission Lines

2010 ◽  
Vol 44-47 ◽  
pp. 2671-2675
Author(s):  
Li Li ◽  
Zhi Yuan Cheng ◽  
Zi Dong Hu
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Finite Element Model ◽  
Transmission Line ◽  
Virtual Work ◽  
Element Model ◽  
Aerodynamic Characteristics ◽  
Rotational Degree ◽  
Specific Expression ◽  
Non Linear

The general expression of Lagrange nonlinear cable element is established firstly by using virtual work principle. On the basis of the theory, the specific expression of a two-node cable element having rotational degree of freedom is derived and the non-linear finite element model of multi-span transmission line for galloping analysis was established. In addition, the aerodynamic coefficient of iced conductor under different wind attack angle was obtained through computational fluid dynamics method. Based on the finite element model and aerodynamic characteristics of the iced conductor, the Runge-Kutta method was applied to carried out non-linear numerical simulation of iced conductor galloping and the Matlab program was compiled. The galloping of the multi-span transmission line crossing Hanjiang River was analyzed. The results indicate that the presented method can simulate the galloping process effectively and it can provide the basic references for further research of preventing galloping.

Finite Element Analysis for the Collapse Accident of One 110kV Transmission Tower

2013 ◽  
Vol 690-693 ◽  
pp. 1940-1944
Author(s):  
Ming Jian Jian ◽  
Du Qing Zhang ◽  
Guang Cheng Zhang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Finite Element Model ◽  
Transmission Line ◽  
Element Model ◽  
Strong Wind ◽  
Transmission Tower ◽  
Element Analysis ◽  
Line System ◽  
Buckling Instability

One collapse tower of 110 kV transmission line was taken as an example and a finite element model for the coupled tower-line system was established for investigating the effects of the strong wind on the transmission tower and line. The result shows that the selected standard of material of some rod members is lower, and the area of their section is relatively small. Main legs present buckling instability because of being in compression under action of the strong wind, which leads to the collapse accident of the towers.

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